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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .box {
            width: 1200px;
            height: 700px;
            background-color: #2c2c2c;
            position: relative;
            left: 0;
            top: 0;
            margin: 10px auto;
        }
    </style>
</head>

<body>
    <div class="box"></div>
</body>
<script src="./js/utils1.js"></script>
<script src="./js/fireWork.js"></script>
<script>
    new FireWork();
</script>

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